Comfort Zone Digital Electric Oil Filled Radiator Heater features a digital interface with soft touch push button controls, with on/off power indicator light; display can be set to Fahrenheit or Celsius readouts. Timer function turns heater on/off in 1 hour increments for up to 10 hours. Comfort Zones Digital Electric oil filled radiator heater is permanently sealed and never needs refueling. This Comfort Zone heater has many safety features including a safety tip over switch, safety overheat protection system and a molded stay cool handle for easy transport from room to room as well as 4 easy to assemble casters. ETL listed. Comfort Zone is driven to perfection producing quality products for everyday living.